Back scratching device



FIG. 1 is a front elevational view of a back scratching device showing my new design;

FIG. 2 is a side elevational view thereof; and

FIG. 3 is an end elevational view thereof.

The undisclosed side and end are the same in appearance as the side and end shown and the undisclosed rear is flat and unornamented. 

The ornamental design for a back scratching device, as shown and described. 